No. 1, August, 1920] GENETICS 49 



:>>(). Frolich, G Abstammungs- und Inzuchtsforschungen. Dargestellt an der wicht- 

 Igsten Blutlinie des weissen deutschen Edelschweines, Ammerlander Zucht. [Pedigree and 

 inbreeding investigations. Represented in the most important bloodlines of improved white 

 German swine, Ammerland breed.] Kuhn-Archiv 7: 52-129. 6 pi. 191^. 



367. Frolich, G. Wichtigste Blutlinie des weissen deutschen Edelschweines, Ammer- 

 lander Zucht. [Most important blood-lines of improved white German swine, Ammerland 

 breed.] Deutsch. Landw. Presse. 46: 24. 12 fig. 1919. 



3bS. Frolich, G. Die Beeinfiussung der Kornschwere durch Auslese bei der Ziichtung 

 der Ackerbohne. [The influencing of grain-weight by selection in the breeding of field beans.] 

 Friedrichswerther Monatsber. 9: 7-8, 17-20. 1919.— See Bot. Absts. 5, Entry 268. 



369. Frolich, G. Die Umziichtung von Wintergetreide in Sommergetreide. [The 

 breeding of winter cereals into spring cereals.] Friedrichswerther Monatsber. 9: 27-30. 

 1919.— See Bot. Absts. 5, Entry 267. 



370. Frost, H. B. Mutation in Matthiola. Univ. California Publ. Agric. Sci. 2: Sl-190. 

 1919. — Occurrence, characteristics and heredity of certain aberrant types of Matthiola annua 

 Sweet are described. These aberrant forms resemble some of the "mutant" types produced 

 by Oenothera Lamarckiana. It is highly probable that they are originally produced by mu- 

 tation but it is uncertain whether aberrant individuals arise by immediate mutation or by 

 segregation. Although the species is typically Mendelian with respect to various characters, 

 yet individuals of the mutant types give erratic hereditary ratios suggestive of Oenothera. 

 Six out of eight types studied have shown their heritability in progeny tests. Some of the 

 types have been produced by many parents and in several pure lines isolated from the original 

 commercial variety, "Snowflake." — Mutant types are in general inferior to Snowflake in vigor, 

 fertility and various form and size characters. The early type is practically a smaller and 

 earlier Snowflake and is probably due to a single dominant mutant factor. In five other 

 types no true-breeding individuals have yet been found although it is known that in three of 

 the types the mutant factor (or factors) is carried by both eggs and sperms; hence it appears 

 that these mutant factors are imperfectly recessive for a lethal effect. Evidence is reported 

 for linkage of three mutant factors with the factor pair for singleness and doubleness of flowers 

 but selfing ratios suggest duplication of a chromosome (non-disjunction) as in Oenothera 

 lata. Further study may help to explain the remarkable genetic behavior of Oenothera and 

 Citrus. — E. B. Babcock. 



371. Fruwirth, C. Zum Verhalten der Bastardierung spontaner Variationen mit der 

 Ausgangsform. [The hybridization of a spontaneous variation with the original form.] Zeit- 

 schr. Pflanzenzucht. 7: 66-73. 2 fig. June, 1919. — Author observed a spontaneous variation 

 in color of seed coats of a spotted strain of narrow-leaved lupine {Lupinus angustifolius) . 

 This variation was a dilution of the color. It has bred true since 1911. Reciprocal hybrids 

 were made between this dilute-colored form and the parent strain. In Fi dilute color was 

 dominant when maternal parent was dilute and recessive when the paternal parent was 

 dilute. Segregation occurred in both hybrids in second and subsequent generations but 

 behavior was very irregular. — J. H. Kemplon. 



372. Fruwirth, C. [German rev. of: Fruwirth, C. Handbuch der landwirtschaft- 

 lichen Pflanzenzuchtung. II. Die Ziichtung von Mais, Futterriiben und anderen Ruben, Oel- 

 pflanzen und Grasern. (Handbook of agricultural plant breeding. II. The breeding of maize, 

 fodder beets and other root-crops, oil plants and grasses.) 3rd. cd., 262 p., 50 fig. Paul Parey: 

 Berlin, 1918.] Zeitschr. Pflanzenzucht. 7: 144-145. Dec, 1919. 



373. Fruwirth, C. Die gegenwartige Organisation der Pflanzenzuchtung in Deutsch- 

 land und in Osterreich-Ungarn. [The present organization of plant breeding in Germany and 

 Austro-Hungary.] Nachricht. Deutsch. Landw. Ges. Osterreich 1919: 35-39. 1919.— See 

 Bot. Absts. 5, Entry 269. 



BOTANICAL ABSTRACTS, VOL. V, NO. 1 



